Shower mixer



FIG. 1 is a perspective view of a shower mixer showing my new design;

FIG. 2 is a left side view of the shower mixer;

FIG. 3 is a front view of the shower mixer;

FIG. 4 is a top view of the shower mixer; and,

FIG. 5 is a bottom view of the shower mixer.

The left side view (FIG. 2) and the right side view (not shown) of the shower mixer are symmetrical. The back view (not shown) of the shower mixer is substantially flat and unornamented. The features shown in broken lines are provided for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a shower mixer, as shown and described. 